Image Resizer

Use Exact px when a platform specifies dimensions, like 1200x630 for a link preview. Max edge is safer for mixed batches because it caps the longest side without distorting anything. Percent works when you just want everything half size or double size.

It can. Turn on the Lock aspect ratio switch and editing one field recalculates the other automatically. Only switch it off when you genuinely want a non-proportional resize.

Drop it in, choose Exact px, and type your target width; with the ratio locked, a 4032x3024 shot turns into 1200x900 as soon as you enter 1200. That's a fraction of the original pixel count, which loads far faster.

This is one. There's no signup, no stamp on the output, and no file counter. The processing happens on your device, which is also why nothing needs a paid server behind it.

Enlarging can't invent detail; the canvas interpolates new pixels from existing ones, so a 200 percent upscale spreads the same information across four times the area. Small bumps are fine, but big enlargements always trade sharpness.

Yes, drop them all in together. Every file gets the same mode and settings, and the results download as one ZIP. Max edge mode is usually the right choice there, since tall and wide files won't both fit one exact size.

Downscaling with this tool uses the browser's high-quality smoothing, so shrinking a photo usually looks crisp. JPG output is re-encoded at 0.92 quality, a setting chosen to keep compression artifacts hard to spot.

Not in centimeters directly. The Width and Height fields take pixels, since that's what screens and most upload forms measure. To handle online photo resize width and height in cm, convert first: at 300 DPI for print, one cm is about 118 pixels, so a 10 by 15 cm print is roughly 1181 by 1772 pixels. Type those into Exact px and you get the photo resize width and height in cm you were after.

Only pixels on the input side, so there's no image resize centimeters box to fill in. The math is quick though. Multiply the centimeter figure by your target DPI and divide by 2.54, then enter the result as the pixel width. For screen use, about 38 pixels per cm at 96 DPI keeps things sharp without going oversized.

Work in pixels using the same DPI trick. One millimeter at 300 DPI is about 11.8 pixels, so a 210 mm wide A4 page comes to roughly 2480 pixels. There's no resize image in millimeters online field here, but converting to Exact px lands you on the exact print dimensions, and online resize image in mm becomes a one-line calculation.

The controls are pixel-based, so it isn't an online image resizer in mm in the literal sense. Most people after an online photo resizer in mm want a print size, which pixels handle fine once you pick a DPI. Decide on 300 for print or 150 for a rough draft, convert the millimeters, and type the pixel value into the Width field.

You can hit any millimeter target by translating it to pixels first. To change image size in mm online, multiply the width in mm by your DPI, divide by 25.4, then enter that pixel count in Exact px mode with Lock aspect ratio on. The height fills itself, so the proportions never shift.

Same approach as the metric units. To resize image in inches, multiply the inch measurement by your DPI: a 4 by 6 inch photo at 300 DPI is 1200 by 1800 pixels. Enter that in the Width and Height fields and the output matches the print size exactly.

Yes. Cutting the pixel dimensions is the most reliable way to reduce image size online, since fewer pixels means fewer bytes. Drop the photo in, switch to Percent mode, and scale it to 50 percent to roughly quarter the file. As an online photo size reducer it works on the dimensions, which usually shrinks the download more than a quality tweak alone.

It doesn't take a kilobyte target. To resize image online in kb, or to work as an online photo resizer in kb and pixels, resize the dimensions here first, then run the file through the Image Compressor, which has a target max size slider from 0.1 to 10 MB. That pairing hits both a pixel size and a weight ceiling.

Usually by a lot. A 4032 by 3024 phone shot dropped to 1200 wide loses about 90 percent of its pixels, and the JPG re-encodes at 0.92 quality on the way out. So jpg reduce size online happens as a side effect of the smaller dimensions, though the Image Compressor squeezes further if you need a hard number.

It is. There's no account, no watermark, and no export cap, which makes it a photo resizer online free of the usual catches. Because the work runs on a canvas in your own browser, an online pic resize never uploads the file, so there's no server bill to pass on to you.

Pick Exact px, then type the numbers you want. To change photo size precisely, turn on Lock aspect ratio and edit one field; the other recalculates so nothing stretches. When you need specific resize image dimensions like 1080 by 1080, enter both with the lock off, but only when you actually want a non-proportional result.

Yes. The output reuses your source format, so as a photo resizer jpeg files come back as JPG and PNGs stay PNG. That makes it straightforward for photo resizer in jpg workflows, since the extension and type match what you dropped in, re-encoded once at high quality.